Cylinder-machine for pulp.



No. 685,374. Patented 0c-t. 29, 190|.

H. GAARA.

CYLINDER MACHINE FOR PULP.

(Application tiled Apr. 11, 1901.)

(llo Model.) 2 Sheets-Sheet l.

No. 685,374. Patented Oct. 29, |90I.

H. MARA.

CYLINDER MAGHINE FOB PULP.

(Application led Apr. 11, 1901.) (lo Model.) 2 Sheets-Sheet 2.

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UNITED f STATES ji PATENT (,)EErcEt4 nALvoE GAAEA, or sK1EN,NoEwAY.

CYLINDER-MACHINE FOR PULP.

SPECIFICATION forming part Of LGGI'S PatentNO. 685,374, dated. October29, 1901.

l Application led April 11, 1901. Serial No. 55,356. (No model.)

To @ZZ whom t may concern,.-

Beit known that I, HALVOR GAARA, a subject of the King of Sweden andNorway, residing at Skien, Norway, have invented certain new and usefulImprovements in Cylinder-Machines for Pulp; and I do hereby declare thefollowing to be a full, clear, and eX- act description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters of reference marked thereon, which form a part of thisspecification.

My invention relates to cylinder-machines used in connection with themanufacture of paper-pulp; and it consists in means whereby part of thewaterpassing through the strainerplates may be removed from the cylinderseparately from the other part of the water.

It is a known fact that the part of the water passing through the upperportion of the cylinder submerged in the vat contains consid'- erableVery nely divided pulp, while the water passing through the lowerportion of the cylinder is free from this dust stuff. By way of the verysimple means which I have invented I can gather up' the water containingthis dust stuff, and it may then be pumped up into the vat again wherebylosses are prevented and the water leaving the mill will be completelyclean, and so no contamination ofl therivers will be caused, as is nowthe case.

My invention consists in mounting within the cylinder, but without anycontact or connection with the same, one or more gutters or receptaclesand causing the water containing the duststu to ow from the top part ofthe cylinder into said gutter or gutters by providing on the innercircumference of the cylinder a continuous series of radially-disposedshovels or ribs, which prevent the water from percolating downward alongthe walls of the cylinder and cause it to drop vertically into saidgutter.

In the accompanying drawings, Figure 1 is a cross-section, and Fig. 2 alongitudinal section, through a straining apparatus, showing a preferredform of carrying out my inventiono The strainer-cylinder a is mountedupon its shaft by means of central arms c, whereby sufficient space isafforded at both ends for the introduction of gutters or receptacles b,serving to collect the water from the upper part of the cylinder.; Thecylinder is provided on its inner side with ribs d, which direct thewater entering at the top of the cylinder away from its inner surfaceand cause it to drop into the receptacles b.

Washing-pipes g may be provided for the purpose of cleaning the cylinderon its inner surface.

I claim- 1. In a cylinder-machine, the combination with the tank and thecylinder revoluble thereini of means for drawing o the liquid from saidcylinder at points near the bottom of the tank and near the surface ofthe liquid therein respectively,for the purpose set forth.

2. In a cylinder-machine, the combination with the tank and the cylinderrevoluble therein provided with directing plates or ribs disposed todirect the fluid passing through the meshes of the cylinder-,coveringinto said cylinder, and means for collecting and educting the liquidpassing into the cylinder near the surface of the liquid in the tank,and means fork educting theliquid from said cylinder near the bottom ofthe tank, for the purpose set forth.

3. In a cylinder-machine, the combination with the tank, and thecylinder revoluble therein provided with directing -plates arranged todirect the liquid passing through its meshes away from its innerperiphery; of one or more troughs within the cylinder near the surfaceof the liquid in the tank arranged to collect the liquid from thedirecting-plates and discharge the same outside of the tank, and meansfor discharging liquid from said cylinder near the bottom of the tank,substantially as and for the purpose set forth.

In witness whereof I have hereunto setmy hand in presence of twowitnesses.

HALVOR GAARA,

Witnesses: p

ALFRED J. BEYN, J ou'. VAALEE.

